Work vehicle

Abstract

A climbing device body ( 21 ) can assume by a rotation operation an erect, retracted position allowing a first end portion ( 21 A) to be positioned above and a second end portion ( 21 B) to be positioned below and a tilted, deployed position allowing the second end portion ( 21 B) to be positioned sideways of the vehicular body outer than the first end portion ( 21 A). A handrail ( 22 ) is engaged with the rotation operation to be capable of assuming a raised state allowing a gripping portion ( 22 a ) to assume a first position distant from the climbing device body ( 21 ) in a deployed position and a folded state allowing the gripping portion ( 22 a ) to assume a second position close to the climbing device body ( 21 ) in a retracted position.

The invention claimed is: 
     
       1. A work vehicle comprising:
 a vehicular body; 
 a climbing device body including a side member having a pair of right and left first end portions connected to the vehicular body and a pair of right and left second end portions being the other ends corresponding to the first end portions, and a plurality of step portions sandwiched by the side member; and 
 a support member including a driving member that is extendably and contractibly drivable, and having one end portion attached to the vehicular body and the other end portion attached to the side member, 
 the side member being contracted by driving the driving member to reduce a distance of each of the plurality of step portions, thereby allowing the climbing device body to assume a retracted position in which the climbing device body is erected to allow the first end portions to be positioned above and the second end portions to be positioned below. 
 
     
     
       2. The working vehicle according to  claim 1 , wherein as the driving member contracts, the side member contracts, and as the side member contracts, the climbing device body assumes the retracted position. 
     
     
       3. The working vehicle according to  claim 2 , wherein
 the climbing device body switches between a deployed position and the retracted position with respect to the vehicular body, and 
 as the driving member extends, the side member assumes an elongate state, and as the side member assumes the elongate state, the plurality of step portions are distant from one another, and thereby the climbing device body assumes the deployed position being an inclined state in which the second end portions are located outer than the first end portions on a lateral side of the vehicular body. 
 
     
     
       4. The working vehicle according to  claim 3 , wherein the vehicular body includes front and rear wheels and the climbing device body is positioned between the front and rear wheels. 
     
     
       5. The working vehicle according to  claim 1 , wherein the side member is contracted in length by driving the driving member to reduce a distance between each of the plurality of step portions. 
     
     
       6. The working vehicle according to  claim 1 , wherein the side member has a first member and a second member and the length of the side member is changed as the second member is slid relative to the first member by driving the driving member.